This is stupid, but here goes. If the cult had its hooks deep enough into Fujisaki that said cult's disbandment would negatively affect the company, Hibiki wants to uh. Attempt to take Fujisaki over. Out of spite that they wouldn't let her buy it earlier. (She would mostly delegate the tasks of actually running said company to any competent employees who remain, so it shouldn't affect said company too much. They just might suddenly have fancier decor. And small, adorable officemates with wheels.)

Is that a thing that is possible, because I totally understand if it isn't. In which case The Company Shikyoin Hibiki Couldn't Buy can just become a running gag... If there are alternative plans from other characters with more...legitimate...grudges against the company, I'm OK with them getting dibs, too. Hibiki is just petty.